Should I offer a certain discount if customers purchase a certain amount of packs? I’m selling these for $8/each.

no

Why?  Do resturants offer a discount when you buy 5, 6 or more courses?  Now if maybe they order 100 at a time I *might* consider a 10% discount

I think your prices are already low for that detail. perhaps offering a 10% off of $100 gift certificates. but id raise prices especially if you are delivering these. they are currently priced same as cheap cupcakes, but with a lot more labor. 

i have so many people say to me that if i offer a coupon I lower MY worth. it is art after all. But i personally love thinking im getting a great deal, so I send 1 email out per month with a special discount only available to those who get the email. 

Friends get 10% off if they pick up.

Absolutely not